EP0723086A1 - Schraube mit einem trennbaren Schraubenkopf und Schraubwerkzeug für eine solche Schraube - Google Patents

Schraube mit einem trennbaren Schraubenkopf und Schraubwerkzeug für eine solche Schraube Download PDF

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Publication number
EP0723086A1
EP0723086A1 EP96400090A EP96400090A EP0723086A1 EP 0723086 A1 EP0723086 A1 EP 0723086A1 EP 96400090 A EP96400090 A EP 96400090A EP 96400090 A EP96400090 A EP 96400090A EP 0723086 A1 EP0723086 A1 EP 0723086A1
Authority
EP
European Patent Office
Prior art keywords
screw
head
tube
neck
diameter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96400090A
Other languages
English (en)
French (fr)
Other versions
EP0723086B1 (de
Inventor
Pascal Detable
Michel André
Fabienne Covello
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Caillau SAS
Original Assignee
Etablissements Caillau SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Etablissements Caillau SAS filed Critical Etablissements Caillau SAS
Publication of EP0723086A1 publication Critical patent/EP0723086A1/de
Application granted granted Critical
Publication of EP0723086B1 publication Critical patent/EP0723086B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B21/00—Portable power-driven screw or nut setting or loosening tools; Attachments for drilling apparatus serving the same purpose
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B31/00—Screwed connections specially modified in view of tensile load; Break-bolts
    • F16B31/02—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load
    • F16B31/021—Screwed connections specially modified in view of tensile load; Break-bolts for indicating the attainment of a particular tensile load or limiting tensile load by means of a frangible part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/14—Arrangement of torque limiters or torque indicators in wrenches or screwdrivers
    • B25B23/1415—Break members; Arrangements specially adapted for break-bolts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
    • F16B41/002—Measures against loss of bolts, nuts or pins

Definitions

  • the present invention relates to a screw comprising, successively disposed between its first and its second end, a first polygonal head, a rupture neck, a second polygonal head and a threaded barrel, the rupture neck having a diameter smaller than those of the heads and of the barrel.
  • a screw of this type is already known, in particular from patent GB-A-898,026.
  • the rupture neck is liable to be broken during tightening, when the tightening torque has reached a predetermined value corresponding to the minimum diameter of the collar.
  • the second head, the closest to the barrel, nevertheless remains usable for dismantling and possibly replacing the screw.
  • the present invention aims to remedy these drawbacks and proposes a screw of the aforementioned type, improved to allow the recovery of the first head after the rupture of the neck.
  • the screw further comprises a cylindrical bearing portion, located between the rupture neck and the second head and having a diameter at least equal to that of the rupture neck and less than that of the second head.
  • the diameter of the cylindrical bearing portion is preferably greater than that of the rupture neck.
  • the screw has a shoulder located between the cylindrical bearing portion and the second head, while the free end of the first head has a substantially frustoconical portion widening towards the rupture neck.
  • the invention also relates to a screwing tool for such a screw, comprising a screwing tip and means for driving in rotation.
  • the endpiece comprises a tube having internal diametric dimensions adapted to receive at least the first head of the screw, having a first end open towards the outside of the endpiece and comprising a so-called grip portion, capable of engaging with the first head of the screw.
  • the invention proposes to remedy this drawback.
  • the screwing tool comprises elastic means arranged between the first end and the grip portion of the tube, these elastic means making, in the free state, radially projecting inside the tube and being capable of s '' embrace to allow the insertion of the first head of the screw to the grip portion of the tube and to cooperate with the cylindrical bearing portion of the screw, when the first head of the latter is in said grip portion .
  • the tool comprises a storage chamber and a member for opening and closing this chamber, the latter being connected to the grip portion and being capable of containing at least a first sectioned screw head.
  • FIG. 1 shows a screw 10 which has a first end 10a and a second end 10b between which it has successively a first polygonal head 12, a breaking neck 14, a second polygonal head 16 and a threaded barrel 18.
  • polygonal head is meant a head whose radial periphery has facets intended to cooperate with a screwing tool.
  • the heads of the screw are of hexagonal section. They preferably have the same diameter.
  • the rupture neck is a zone of weakness, capable of being broken during the tightening of the screw by its first head 12 and whose diameter is less than that of the heads 12 and 16 and of the barrel 18.
  • the screw comprises a cylindrical portion of bearing 20, the diameter of which is greater than that of the rupture neck and less than that of the second head.
  • the screw 10 has a shoulder 16a located between the cylindrical bearing portion 20 and the second head 16. In fact, this shoulder 16a is formed on the end of the head 16 closest to the first end 10a of the screw.
  • the free end of the first head 12 has a substantially frustoconical portion 12a which widens towards the rupture neck 14.
  • the first head 12 of the screw is produced in a conventional manner, that is to say that its free end 12a is slightly chamfered.
  • this screwing tool 30 comprises a screwing tip 32 and rotation drive means 33.
  • these rotation drive means are constituted by a plurality of facets produced on the end 30b of the tool opposite to the end 30a on which the end piece 32 opens.
  • the end 30b can have the form of a drill bit with polygonal section which can cooperate by complementarity of form with a conventional rotary drive tool.
  • the screwing tool can be provided with any known means for driving in rotation.
  • the end piece 32 comprises a tube 34 having internal diametric dimensions adapted to receive at least the first head 12 of the screw. More precisely, this tube has a first end 34a open towards the outside of the endpiece and successively comprises, from this first end, a cylindrical portion 44, called the guide portion, elastic means 38 and a gripping portion 36 capable of to engage the first head 12 of the screw.
  • the cylindrical guide portion 44 has the shape of a cylinder with a circular base, the diameter of which corresponds substantially to the diameter of the circle circumscribed at the second head 16 of the screw.
  • the grip portion 36 is generally prismatic, of a shape complementary to that of the first head of the screw, and capable of cooperating with it.
  • the elastic means shown in the figures comprise at least one ball and an elastic member cooperating with the latter.
  • the tube has at least one radial hole in which the ball is placed.
  • the balls 46a, 46b and 46c protrude radially inside the tube 34 under the action of the elastic member 48 which keeps each ball in abutment against the edge of the internal end of the hole in which it is placed.
  • the holes generally have the shape of a cylinder whose diameter is at least equal to that of the balls. Only their inner ends are tightened to prevent the ball from coming out inside the tube.
  • the diameter of the internal end of the holes is only slightly less than that of the balls so that, when they rest in abutment against the edge of these internal ends under the effect of the elastic member, they protrude inside of the tube.
  • the outer periphery of the tube 34 has an annular groove 50 (clearly visible in FIG. 4) into which the radial holes open.
  • the elastic member 48 consists of a split ring disposed in this annular groove and thus capable of seeing its diameter increase elastically to allow the erasure of the balls.
  • the tube 34 is capped by a sleeve 52 which protects the balls and the split ring.
  • the internal periphery of the sleeve has an annular groove 54 located opposite the groove 50.
  • the sleeve 52 is fixed to the tube using a screw 56 which passes through the grooves 54 and 50, enters the slot 49 of the tensioned ring 48 and is screwed onto the tube 34.
  • the screw 56 therefore also prevents the ring 48 from turning and keeps its slot 49 outside the radial holes, which allows d '' prevent the balls from coming out of these holes.
  • the screwing tool further comprises a storage chamber 40 and means 42 for opening and closing this chamber.
  • the storage chamber is connected to the grip portion 36 and is capable of containing at least a first sectioned screw head.
  • the tube 34 extends from one end to the other of the screwing tool. It has an intermediate portion 34b located between the grip portion 36 and its second end 34c provided with rotation drive means 33 previously mentioned.
  • the storage chamber 40 is formed in the intermediate part 34b which has a longitudinal opening 58.
  • a portion 59 of the wall of the tube 34 remains on the section provided with the opening 58.
  • This portion 59 constitutes a wall of the storage chamber 40.
  • the latter can be opened or closed using a ring 42 slidingly mounted along the tube 34 between a first position, illustrated by FIG. 9, in which it closes the longitudinal opening 58 and a second position illustrated in FIG. 10, in which it releases this opening.
  • the ring 42 is resiliently biased towards its first position.
  • a section of the tube located between the storage chamber 40 and the second end 34c of this tube has an axial bore 60 in which is housed a spring 62.
  • This spring is connected to a rod 64, passing diametrically through the ring and fixed to the latter, which can move in a slot 66 of the tube.
  • the spring In the first position of the ring, the spring is in expanded position, which keeps this ring in abutment against the sleeve 52.
  • FIG. 1 shows the screw 10 at the start of its insertion into the tube, while it is only engaged in the cylindrical guide portion 44.
  • FIG. 3 The erased position of the balls is illustrated in FIG. 3 and in FIG. 4, the latter being a cross section along the line IV-IV of FIG. 3, passing through the rupture neck 14 'of the sectioned head 12', on which we see the split ring 48 in the expanded position.
  • the first head 12 of the screw When, as shown in FIG. 5, the first head 12 of the screw enters the gripping portion 36 of the tube 34, it pushes back the first sectioned head 12 ′ in the storage chamber 40.
  • the axial progression of the screw inside the tube is stopped when the shoulder 16a of the second head 16 of this screw comes into abutment against the balls. In this position, the balls cooperate with the cylindrical bearing portion 20 and the screwing can be carried out in a conventional manner until the rupture neck 14 breaks.
  • the first head is driven by the grip portion 36, while the second head, inserted in the guide portion 44, is simply guided without any action of screwing being exerted on it.
  • the cylindrical bearing portion 20 having a diameter smaller than that of the heads of the screw, the balls can, during screwing, cooperate with this portion 20 while projecting inside the tube, that is to say that they adopt a position, close to the free state, in which they prevent the head 12 from coming out.
  • Figures 7 and 8 show the situation at the end of the screwing when, after the rupture of the neck 14, we remove the screw 10 deprived of its first head 12 which remains trapped in the tube 34 and thus takes the place of the head 12 ' of FIG. 1.
  • this operation can be carried out by bringing the ring 42 to its second position to release the opening 58.
  • the spring 62 contracts until the rod 64 abuts against the edge 66b of the slot 66 located on the side of the rear of the tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Catching Or Destruction (AREA)
  • Bolts, Nuts, And Washers (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Surgical Instruments (AREA)
  • Automatic Assembly (AREA)
  • Gripping On Spindles (AREA)
  • Door And Window Frames Mounted To Openings (AREA)
  • Connection Of Plates (AREA)
EP96400090A 1995-01-17 1996-01-15 Schraube mit einem trennbaren Schraubenkopf und Schraubwerkzeug für eine solche Schraube Expired - Lifetime EP0723086B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9500440A FR2729438B1 (fr) 1995-01-17 1995-01-17 Vis a tete secable et outil de vissage pour une telle vis
FR9500440 1995-01-17

Publications (2)

Publication Number Publication Date
EP0723086A1 true EP0723086A1 (de) 1996-07-24
EP0723086B1 EP0723086B1 (de) 1998-08-12

Family

ID=9475173

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96400090A Expired - Lifetime EP0723086B1 (de) 1995-01-17 1996-01-15 Schraube mit einem trennbaren Schraubenkopf und Schraubwerkzeug für eine solche Schraube

Country Status (16)

Country Link
US (1) US5624216A (de)
EP (1) EP0723086B1 (de)
JP (1) JPH08232931A (de)
KR (1) KR100387145B1 (de)
CN (1) CN1136646A (de)
AR (1) AR000725A1 (de)
AT (1) ATE169726T1 (de)
BR (1) BR9600125A (de)
DE (1) DE69600494T2 (de)
DK (1) DK0723086T3 (de)
ES (1) ES2122765T3 (de)
FR (1) FR2729438B1 (de)
HU (1) HU216400B (de)
PL (1) PL179869B1 (de)
RU (1) RU2145393C1 (de)
TW (1) TW300277B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998055269A1 (de) * 1997-06-02 1998-12-10 Sfs Industrie Holding Ag Vorsatz für einen schrauber

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7188556B1 (en) * 2004-10-12 2007-03-13 Pilling Weck Incorporated Rotatable hand tool with a torque controller and method
US20070009339A1 (en) * 2005-07-06 2007-01-11 Ambient Corporation Fastener having a plurality of heads
US7846167B2 (en) * 2005-11-07 2010-12-07 Biomet Microfixation, Llc Driver assembly and fastener apparatus
US7334307B1 (en) 2006-05-23 2008-02-26 Tomasz K Helenowski Disposable set screw system
US8382810B2 (en) * 2007-12-05 2013-02-26 Arthrex, Inc. Torsion cutter and cannulated cutter for cutting orthopedic fasteners
US9017333B2 (en) * 2008-04-17 2015-04-28 Warsaw Orthopedic, Inc. Surgical tool
FR2930805B1 (fr) * 2008-04-30 2014-11-28 Gay Pierre Procede et organe de serrage d'un element de visserie, dispositif de fixation et de serrage
US8028608B2 (en) * 2009-04-07 2011-10-04 Depuy Products, Inc. Torque-limiting fastener driver
US20110066156A1 (en) * 2009-09-14 2011-03-17 Warsaw Orthopedic, Inc. Surgical Tool
US8974932B2 (en) 2009-09-14 2015-03-10 Warsaw Orthopedic, Inc. Battery powered surgical tool with guide wire
KR100993327B1 (ko) 2010-07-28 2010-11-09 안재은 볼트 자동 체결장치
CN102168709B (zh) * 2011-04-13 2012-12-12 陈文才 可手动拆卸的防扭过螺钉
US9402673B2 (en) * 2012-09-28 2016-08-02 DePuy Synthes Products, Inc. Devices and methods for breaking and retaining surgical reduction tabs
US9366282B2 (en) 2013-09-06 2016-06-14 Thomas & Betts International Llc Torque controlling break screw
IL231729B (en) 2014-03-26 2018-06-28 Umzen Ltd A nut and a method of fixing an object to the structure of the building
RU178964U1 (ru) * 2015-02-22 2018-04-24 Умзен Лтд. Инструмент для фиксации объекта к строительной структуре
FR3050132B1 (fr) * 2016-03-29 2018-08-17 Schneider Electric Industries Sas Accessoire de serrage au bon couple, et appareil de protection electrique comportant au moins une borne raccordee au moyen d'un tel accessoire
KR102471823B1 (ko) * 2017-09-12 2022-11-28 엘에스전선 주식회사 다단 파단볼트, 전력 케이블의 접속구조 및 전력 케이블 도체 접속장치
RU183253U1 (ru) * 2018-04-17 2018-09-14 Компания Домидо Лимитед Соединительное устройство с отрывной головкой
US20220252099A1 (en) * 2021-02-11 2022-08-11 Afl Telecommunications Llc Fasteners
CN112846666B (zh) * 2021-03-13 2023-05-12 河北东润紧固件有限公司 一种防盗螺丝制作工艺
US20230287922A1 (en) * 2022-03-11 2023-09-14 A. Y. Mcdonald Mfg. Co. Torque limiting fastener

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH228721A (de) * 1942-11-13 1943-09-15 Wolter Robert Steckschlüssel mit Klemmvorrichtung.
GB898026A (en) * 1958-12-29 1962-06-06 Guest Keen & Nettlefolds Ltd Improvements in screw-threaded bolts
US3444775A (en) * 1968-02-16 1969-05-20 Lockheed Aircraft Corp Nut formed with multiple torque-off collars
US3742583A (en) * 1972-01-14 1973-07-03 Standard Pressed Steel Co Method of using twist-off nut to assemble a joint
GB2060452A (en) * 1979-10-19 1981-05-07 Hilti Ag Tool for Applying Torque to Fastening Elements

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3595124A (en) * 1969-05-19 1971-07-27 Keystone Consolidated Ind Inc Controlled torque bolt
JPS57156610U (de) * 1981-03-30 1982-10-01
JPS623530Y2 (de) * 1981-04-27 1987-01-27
DE3813245A1 (de) * 1988-04-20 1989-11-02 Hilti Ag Befestigungselement mit fuehrungsrondelle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH228721A (de) * 1942-11-13 1943-09-15 Wolter Robert Steckschlüssel mit Klemmvorrichtung.
GB898026A (en) * 1958-12-29 1962-06-06 Guest Keen & Nettlefolds Ltd Improvements in screw-threaded bolts
US3444775A (en) * 1968-02-16 1969-05-20 Lockheed Aircraft Corp Nut formed with multiple torque-off collars
US3742583A (en) * 1972-01-14 1973-07-03 Standard Pressed Steel Co Method of using twist-off nut to assemble a joint
GB2060452A (en) * 1979-10-19 1981-05-07 Hilti Ag Tool for Applying Torque to Fastening Elements

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998055269A1 (de) * 1997-06-02 1998-12-10 Sfs Industrie Holding Ag Vorsatz für einen schrauber
US6324946B1 (en) 1997-06-02 2001-12-04 Sfs Industrie Holding Ag Screwdriver adapter

Also Published As

Publication number Publication date
FR2729438A1 (fr) 1996-07-19
HU9600086D0 (en) 1996-03-28
DK0723086T3 (da) 1999-05-17
JPH08232931A (ja) 1996-09-10
AR000725A1 (es) 1997-08-06
PL179869B1 (pl) 2000-11-30
PL312318A1 (en) 1996-07-22
HU216400B (hu) 1999-06-28
RU2145393C1 (ru) 2000-02-10
FR2729438B1 (fr) 1997-04-18
HUP9600086A2 (en) 1996-10-28
DE69600494D1 (de) 1998-09-17
HUP9600086A3 (en) 1998-05-28
DE69600494T2 (de) 1999-03-04
ATE169726T1 (de) 1998-08-15
ES2122765T3 (es) 1998-12-16
KR100387145B1 (ko) 2003-08-14
BR9600125A (pt) 1998-01-27
US5624216A (en) 1997-04-29
KR960029031A (ko) 1996-08-17
EP0723086B1 (de) 1998-08-12
CN1136646A (zh) 1996-11-27
TW300277B (de) 1997-03-11

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